Exodus 12:22-24

Common English Bible

²² Take a bunch of hyssop, dip it into the blood that is in the bowl, and touch the beam above the door and the two doorposts with the blood in the bowl. None of you should go out the door of your house until morning. ²³ When the Lord comes by to strike down the Egyptians and sees the blood on the beam above the door and on the two doorposts, the Lord will pass over that door. He won’t let the destroyer enter your houses to strike you down. ²⁴ You should observe this ritual as a regulation for all time for you and your children.